docs: def parseSingleAttr(self, attrValue):
          """Parse a single CSS attribute source string, and returns the built CSS expression.
          Use to parse a tag's highly CSS-based attributes like 'font'.
  
          See also: parseAttributes
          """
  
          results = self.parseAttributes(temp=attrValue)
          if 'temp' in results[1]:
              return results[1]['temp']
          else:
              return results[0]['temp']